66091254 has 16 divisors (see below), whose sum is σ = 132652992. Its totient is φ = 21952008.

The previous prime is 66091237. The next prime is 66091309. The reversal of 66091254 is 45219066.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17764 + ... + 21159.

It is an arithmetic number, because the mean of its divisors is an integer number (8290812).

Almost surely, 2^66091254 is an apocalyptic number.

66091254 is an abundant number, since it is smaller than the sum of its proper divisors (66561738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66091254 is a wasteful number, since it uses less digits than its factorization.

66091254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39211.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 66091254 is about 8129.6527601122. The cubic root of 66091254 is about 404.3101684686.

The spelling of 66091254 in words is "sixty-six million, ninety-one thousand, two hundred fifty-four".